In smaller sized greenhouses, a manual system opened and closed yourself could possibly be installed. These work simplest when the screen materials is supported by a track system.
Start time – when in the morning will the display system start operation
Stop time – when in the afternoon will the display screen system stop operation
Light level – at what light strength will the screen end up being activated either to open or close
Maximum/Motor Gearboxes For Greenhouse minimum temperature – what are the limits of temperature desired
Maximum/minimum humidity – What exactly are the limitations of humidity desired
Gap positions – this models the percent open up or close placement under different conditions such as in early stages a winter early morning to lessen thermal shock 
or during the summer to provide better shading. The gap guidelines and speed of motion can be controlled in a few systems.
Time delay – under changeable climate this avoids frequent starting and closing
Wind speed – To reduce heat loss, the screen could be closed early below high wind speed conditions
Snow detection – this may open the display screen and turn on heat when it begins to snow.
The standard system uses nylon monofilament or stainless cables to aid the screen material. The screen material can either rest along with the network of cables or be suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that techniques the industry leading of the screen material. Control is certainly either with a manual switch or electronic controller.
Based on the above, the grower is required to enter the next parameters in to the controller:
A climate station is required to provide outdoor light level, temperature, humidity, wind and rain or snow conditions.